384 TEST ACE A ATLAS TICA. 



Habitat Teneriffam ; iu limnidis sylvaticis editioribus, raris- 

 sima. 



The H. leprosa is one of the rarer species of the archipelago, 

 and one which has been found hitherto only in the damp sylvan 

 districts, at a rather high altitude, in Tenerifle, — where it was 

 taten by Mr. Lowe and myself at the Agua Mansa (on the 

 mountains above the Villa of Orotava), and previously in the 

 same spot by Blauner and Grasset ; and we also met with it at 

 the edges of the Vueltas above Taganana. 



Were it not for the smallness of its almost concealed um- 

 bilicus, the present Helix might weU-nigh be treated as a 

 Patula, — it ha\ing somewhat the prirad facie appearance of 

 certain forms (such as the ^ladeiran H. d^eflorata, Lowe) which 

 I have arranged under the section lulus; but its comparatively 

 minute and nearly closed-up perforation, in conjunction with its 

 more conspicuously pilose surface, cause it to be better asso- 

 ciated with the members of the Hi^j^idelki- group: though I 

 am inclined to suspect that at any rate the ]\Iadeiran H. actino- 

 phora, to which Mousson considers it allied, is more naturally 

 placed amongst the keeled and slightly hispid Patulas of the 

 gorgonarura- and Bertholdiana-type. 



Apart from its somewhat lenticular, obtuse, depresso-glohose 

 Patula-like contour and almost closed umbilicus, the H. leprosa 

 (^the larger examples of which measure nearly 5 lines across the 

 broadest part) may be known by its thin, fragile substance, and 

 pale corneous yellowish-brown hue, and by its hairy and nearly 

 opake surface being coarsely sculptm^ed with oblique and closel}- 

 packed costate striae. Its apex is rounded and blunt, its basal 

 whorl is almost free from angidation, and its peristome is acute 

 and unthickened, but nevertheless a little expanded and re- 

 flexed, with the margins wide apart at their insertion, — being 

 totally unconnected irder se by a corneous lamella. 



Helix lanosa. 



Helix lanosa, Mouss., Faun. Mai. des Can. 61. pi. 3. f. 3-1- 

 36 (1872) 

 „ „ Pfeif., Mon. Hel. vii. 273 (1876) 



Habitat ' Canaries ' (coll. Tarnier) ; ab exemplare unico a cl. 

 MoussoD descripta. 



This is a species which was established by Mousson on the 

 evidence of a single example which had been communicated to 

 him by M. Tamier, of Dijon, as having come from the ' Cana- 

 ries,' but without any kind of note as to its precise locality ; 

 and, considering how nearly related it manifestly must be to the 

 H. leprosa, and considering also the absolute uncertainty of its 



